Originally posted by Big D
Let's look at a situation where one character - Squall, for instance - has an 'Elemental Attack - Fire' rating of 100%. Rinoa has an 'Elemental Defence - Fire' rating of 100%. She's totally immune to Fire magic, she'll actually absorb it.

Let's then suppose that Squall attacks her with his fire-elemental Gunblade. She'll gain HP, absorbing the damage. To me, this is just absurd. No matter how flame-proof you are, it's still going to hurt if someone shoots you in the face, or hacks at your body with a whopping great sword.
Well, in that situation. It would lower your SeeD rank to hit your own party members, even if it heals them.